Posted 20 May 2011 - 05:34 PM
I suggest waiting until the AMD 900 series chipset comes out along side the new Bulldozer CPU's. You can still use certain AM3 motherboards with AMD 800 series chipsets, but you will probably get more features and better performance with AM3+ Bulldozers if you get the 900 series. Also, current motherboards with AMD chipsets will not do SLI, you need to get a motherboard with an nForce chipset. This is because nVidia has not licensed out their technology to AMD for their current chipsets, unlike Intel. However, the upcoming AMD 900 series chipsets and motherboards will be able to do both SLI and Crossfire. Currently, the new Bulldozer CPU's are due out around June 20.
If you must have a CPU now, you can certainly get the Phenom II X4 945 and put it in your motherboard if you have the appropriate BIOS installed as indicated on Asus' CPU support list. However, your motherboard is already out-of-date, it will be even more when the new CPU's launch. Keep in mind, that if you choose to use any of the upcoming AM3+ Bulldozers, you will also need to replace your RAM since new boards use DDR3.